tools/scripts/Kconfig: Update references from kconfig-language.txt to rst

The Linux kernel documentation has transitioned from using
kconfig-language.txt to kconfig-language.rst. Therefore update all
occurrences of kconfig-language.txt.

Signed-off-by: Hiago De Franco <hiago.franco@toradex.com>

Kconfig

@@ -1,6 +1,6 @@
 #
 # For a description of the syntax of this configuration file,
-# see the file Documentation/kbuild/kconfig-language.txt in the
+# see the file Documentation/kbuild/kconfig-language.rst in the
 # Linux kernel source tree.
 #
 mainmenu "U-Boot $(UBOOTVERSION) Configuration"

scripts/kconfig/symbol.c

@@ -1117,7 +1117,7 @@ static void sym_check_print_recursive(struct symbol *last_sym)
 	}
 
 	fprintf(stderr,
-		"For a resolution refer to Documentation/kbuild/kconfig-language.txt\n"
+		"For a resolution refer to Documentation/kbuild/kconfig-language.rst\n"
 		"subsection \"Kconfig recursive dependency limitations\"\n"
 		"\n");
 

scripts/kconfig/tests/err_recursive_dep/expected_stderr

@@ -1,38 +1,38 @@
 Kconfig:11:error: recursive dependency detected!
 Kconfig:11:	symbol B is selected by B
-For a resolution refer to Documentation/kbuild/kconfig-language.txt
+For a resolution refer to Documentation/kbuild/kconfig-language.rst
 subsection "Kconfig recursive dependency limitations"
 
 Kconfig:5:error: recursive dependency detected!
 Kconfig:5:	symbol A depends on A
-For a resolution refer to Documentation/kbuild/kconfig-language.txt
+For a resolution refer to Documentation/kbuild/kconfig-language.rst
 subsection "Kconfig recursive dependency limitations"
 
 Kconfig:17:error: recursive dependency detected!
 Kconfig:17:	symbol C1 depends on C2
 Kconfig:21:	symbol C2 depends on C1
-For a resolution refer to Documentation/kbuild/kconfig-language.txt
+For a resolution refer to Documentation/kbuild/kconfig-language.rst
 subsection "Kconfig recursive dependency limitations"
 
 Kconfig:32:error: recursive dependency detected!
 Kconfig:32:	symbol D2 is selected by D1
 Kconfig:27:	symbol D1 depends on D2
-For a resolution refer to Documentation/kbuild/kconfig-language.txt
+For a resolution refer to Documentation/kbuild/kconfig-language.rst
 subsection "Kconfig recursive dependency limitations"
 
 Kconfig:37:error: recursive dependency detected!
 Kconfig:37:	symbol E1 depends on E2
 Kconfig:42:	symbol E2 is implied by E1
-For a resolution refer to Documentation/kbuild/kconfig-language.txt
+For a resolution refer to Documentation/kbuild/kconfig-language.rst
 subsection "Kconfig recursive dependency limitations"
 
 Kconfig:60:error: recursive dependency detected!
 Kconfig:60:	symbol G depends on G
-For a resolution refer to Documentation/kbuild/kconfig-language.txt
+For a resolution refer to Documentation/kbuild/kconfig-language.rst
 subsection "Kconfig recursive dependency limitations"
 
 Kconfig:51:error: recursive dependency detected!
 Kconfig:51:	symbol F2 depends on F1
 Kconfig:49:	symbol F1 default value contains F2
-For a resolution refer to Documentation/kbuild/kconfig-language.txt
+For a resolution refer to Documentation/kbuild/kconfig-language.rst
 subsection "Kconfig recursive dependency limitations"

tools/buildman/kconfiglib.py

@@ -6,7 +6,7 @@ Overview
 ========
 
 Kconfiglib is a Python 2/3 library for scripting and extracting information
-from Kconfig (https://www.kernel.org/doc/Documentation/kbuild/kconfig-language.txt)
+from Kconfig (https://www.kernel.org/doc/Documentation/kbuild/kconfig-language.rst)
 configuration systems.
 
 See the homepage at https://github.com/ulfalizer/Kconfiglib for a longer
@@ -709,7 +709,7 @@ class Kconfig(object):
 
     mainmenu_text:
       The prompt (title) of the top menu (top_node). Defaults to "Main menu".
-      Can be changed with the 'mainmenu' statement (see kconfig-language.txt).
+      Can be changed with the 'mainmenu' statement (see kconfig-language.rst).
 
     variables:
       A dictionary with all preprocessor variables, indexed by name. See the
@@ -3562,7 +3562,7 @@ class Kconfig(object):
         #
         #  - Propagates dependencies from parent to child nodes
         #
-        #  - Creates implicit menus (see kconfig-language.txt)
+        #  - Creates implicit menus (see kconfig-language.rst)
         #
         #  - Removes 'if' nodes
         #
@@ -5030,7 +5030,7 @@ class Choice(object):
 
         0 (n) - The choice is disabled and no symbols can be selected. For
                 visible choices, this mode is only possible for choices with
-                the 'optional' flag set (see kconfig-language.txt).
+                the 'optional' flag set (see kconfig-language.rst).
 
         1 (m) - Any number of choice symbols can be set to m, the rest will
                 be n.
@@ -5498,7 +5498,7 @@ class MenuNode(object):
 
       Choices and menus naturally have children, but Symbols can also have
       children because of menus created automatically from dependencies (see
-      kconfig-language.txt).
+      kconfig-language.rst).
 
     parent:
       The parent menu node. None if there is no parent.